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. Author manuscript; available in PMC: 2014 Oct 23.
Published in final edited form as: ACS Appl Mater Interfaces. 2013 Oct 1;5(20):10.1021/am4030998. doi: 10.1021/am4030998

Figure 1.

Figure 1

Characterization of RGD-PHEA-g-C18 and RGD-SPIO cluster. (a) Structure of RGD-PHEA-g-C18. (b) TEM image of oleic acid-coated SPIOs. (c) TEM image of RGD-SPIO clusters. Both scale bars represent 50 nm. (d) OA-coated SPIOs (I) are suspended in hexane, while RGD-SPIO clusters (II) are dispersed in water. Dotted white lines help indicate the interface between hexane and water. (e) A plot of 1/T2 vs. iron concentration used to determine T2 relaxivity of RGD-SPIO clusters.